Machine for grinding pallet-stones



E. wosu,

MACHINE FOR GRINDING PALLET STONES.

APPLICATION FILED FEB. 21. 1920.

1,378,364. I P ented May17,1921.

2 SHEETS-SHEET 1.

. fla gen E. LOOSL MAGHINE FOB GRINDING PALLET STONES.

APPLICATION FILED FEB. 21. 1920- Patented May 17 1921.

auuemntoz flew/e $006111,

UNITED STATES A PATENT orrics.

EUGENE LO0SLI,0F ILION, NEW YOR I MACHINE EoE eErNErNe rALLE'r-sroNEs.

ing Pallet-Stones, of which the following is a specification.

This invention relates to a machine for grinding or polishmg pallet andslmilar stones, the invention comprising broadly a rotatable abradingdisk and an arm adapted to carry a pallet stone holder and rocking in anare parallel with the face of the said disk. v

The invention further consists in the novel features of constructionhereinafter described, pointed out in the claims, and shown in theaccompanying drawings, in which Figure 1 is a side elevation.

Fig. 2 is a section on the line 2-2 of Fig. 1.

Fig. 3 is a plan view.

Fig. 1 is an end elevation looking toward the pallet holder.

In these drawings 1 desi ates a suitable base having a slideway 1 1ounted on said base which may be in the form of a'table is a bracket 2supporting a stepped pulley 8, driven by a belt diamond dust. I

A slidable block 6 works in the slideway 1 of the table 1 and has a cutout central portion through which passes a shaft 6 Mounted to rock onthis shaft is a U-shaped member 7 having a'forwardly projecting arm 8 insubstantial alinement with the axis of the grinding wheel 5. It will beobvious that rocking of the U-shaped member Wlll swing said arm in anare parallel with the face of said disk or wheel. The arm 8 carries avertically adjustable block 9, held in position by a set screw 10, andthis block supports a pallet stone holder 11, shdable horizontally withrespect to the block 9. It

will be noted therefore that adjustment in 4 and carrying a grindingwheel 5, the flat face of which is-coated with Specification of LettersPatent. Patentd May 1'7, 1921.

Application filed February 21, 1920. Serial No. 360,326.

The pallet holder 11 may be of -various forms, depending upon the natureof the grinding operation to take place, viz. the manner and angleat'which the stones are to bepresented to the disk 5. In the drawings Ihave shown the form of holder in which the pallet stones are secured toits surface, as at-13 by any suitable adhesive material-and heldtogether and in place by suitable clamps, consisting of a metal plate14: and an angled plate 15. A set screw 12 looks the pallet holder inposition.

A thread block 16 carries a feed screw 17 which advances the block 6 sothat'the pallet holder employed will be moved into position to bring thestones into engagement with the disk 5.

A rocker arm 18 is secured at one end to j a pin 18 carried by theU-shaped member 7 and at the opposite end it is connected to the crankportion of a shaft 19, driven by pulley 20 and belt 21.

It will be noted that during rotation of] the disk the pallet stones aremovedby the rocking of the arm 8 over the rotating surface of the disk,and the speed of rotation of the disk and the rate of vibration of thearm 8 can be independently varied.

face of the disk, the said arm when in intermediate position beingsubstantially in the plane of the axis of the disk, a block carried bythe arm and vertically adjustable, and a pallet stone holder carried bysaid block.

2. In a device of the kind'described, a

grinding wheel, ablock movable toward and away from the face of saidwheel, an arm carried by the block and mounted on a shaft for rocking'said arm, a block adjustably carried by' said arm, andv a pallet stoneholder adjustably carried by the last mentioned block. v V

parallel with the axis of the wheel, means In testimony whereof I affixmysignature.

EUGENE LOOSLL-

